Concrete-block machine



May 29, 1928.

F. J. STRAUB CONCRETE BLOCK MACHINE Filed Nov. 16, 1926 2 Sheets-Sheet l IIIIIIIIIIIIII IA May 29, 1928.

. F. J. STRAUB CONCRETE BLOCK MACHINE- Filed Nov; 16, 1926 I 2 Sheets-Sheet 2 gwumtor a striking off the excess tion is to provide means UNITED STATES PATENT FRANCIS J. STBAUB, or NEW xansmeron, rE vNsYLvANIA,

CONCRETE-BLOCKMACH NE.

Application filed November 16, 1926. Serial No. 148,678.

Thisinvention relates to improvements in block forming machlnery for time of-concrete blocks and similar articles.

the manufac- It has for'its object to provide. means for final tamping and finishing the top ofthe block, in connection with a machine of standard well known construction.

As is generally understood, building blocks when molded in an ordinary stripper block machine, areusua-lly tamped by a series of gravitat-ing power elevated tamps located above the mold and operable therein and around the usual cores ings, with final removal of the blockby vertical lifting. 1'

Ordinarily,. he tops of such blocks are finished after tamping, either by simply removal and 7 block by lowering a finishing plate thereon and driving, it downwardly to the level of the top of the mold by striking the back of the finishing plate with the t amps.

One of the objects of the present inven for supportingthe finishing plate so it will be held flexibly and resiliently, subject to the shocksaof the blows from the tamps, without strain or injury to the plate or its parts, while at the same time permitting the finishing plate to properly adjust itself asit is driven slightly into the mold cavity, with'suitable movement limitationQ Another feature of improvement and advantage is in providing means in connection with an adjustable feeding hopper I for striking or wiping ofi'excess material after the usual tamping, whereby the end portions of the block areleft somewhat higher than the middle portion, providing excess material for reinforcement of theends and cor.-

ners in the limit plate actuated tamping operation.

" In the accompanying drawings I have illustrated the invention as -utilized in .connection with one well. known; form of molding machine and its supply hopper-yin which: l Fig. l'is'a partial sectional'view, showing aportion of the mold "and its tamps, with-the hopper in filling'position; v 2 is 'an end view thereof, showing F-i one form of tamping plate in elevated po-' sition;

Fig. 3 1s a PlflIl'VlGW of Fig. 1; v

for the block open-- material, or by such then smoothing the top of the aggregate, a

sition when not in use,

Fig. dis a view similar to Fig. 25 ,showing the finishing plate lowered to operative position;

Fig.5 isa viewin side elevation, similar to Fig. 1, showing the finishing plate lowered within the mold, as in Fig. 4,

Fig. 6 is a the mounting of the finishing plate;

Fig. 7 is a detail cross section onthe line VIP-VII of Fig; 1;

Fig. 8 is a cross section through the tampshowing a modified ing and pressing plates, construction;

N Fig' 9 is an upper face view of the pressing plate, showing a further modified arrangement, omitting the upper plate;

Fig. 10 is an end View thereof.

In the drawings, portion of the molding which the usual cores, and provided with the customary lifting plate and other accompanying features, not shown. i

For the purpose hopper b means. of structural members side; as channels, whereby the hopper is adapted to travel back and forth on supportina rollers 50f brackets 6.

Ihedatter aresecured to and extend upwardly at each outer side from longitudinal" cross plate members 7, which extendslightly laterally from the molding machine, for such mounting. Hopper 3' is provided with a supporting floor 8, and upwardly extending machine, with n of supplying the raw 3 ismo'vably mounted blocks are molded around the sectlonal detail view, showing 2 represents the upperi 4 at each i sidewalls -9 and an end wall 10 te'rminating slightly below the bottoms of the tamps 11 when elevated, as in Figs. 1 and5.

As thus made the hopper is being moved upon-its rolling trackway into registeringposition with the mold as in Fig. ing of the finishing plate as in Fig. 5 l

The finishing plate is adapted to be auto matically folded upwardly into vertical poto provide clearance for the tamps 11 when the hopper is'moved away from the mold, and to be lowered into registering position therewith, for final top surface finishing, as shown in Fig. 5.- i For such purpose a rock shaft 12 is mounted in brackets 13 secured on theouter front portions of channel members 4, pr0

viding a rocking support for the plate.

capable a or backwardly away therefrom for lowerwidth to fit neatly within the upper edges downward movement an s rubthber itlltiugn't Q12 7:

bearing connection with bar 17 and a re tracting cushioning spring 19 at the other side of arm Saidspring tends tonon mally retract the bar 14E by its bearing against washer 2O,Lsecured by cotter pin 21 or otherwise, as clearly shown in Fig. 6.,

The finishing plate 22 is of a length and of mold 2.. It is securely mounted by countersunk rivets underneath elongated bar 17, and a similar shorter'bar23, which together form the supporting framework for the finishing plate. 1 An upper tamping plate 24: is also fixedly connected with bars 17 and 23 between arms 14 and adapted to receive the impact of the tamps 11, while bars 17 and 23 extend across, the ends 01 the mold, limiting its within itsupper edges. The ends of outer elongated bar 17 are utilizedas' handles when lowering the tin; ishing plate into working position, and the finishing plate'22 itself is provided with clearance openings 25 for the cores.

As thus constructed it will be seen that when the finishing plate and tamping plate are thrown over into registering position with the mold,the upper face-of the block may be compressed and finished by the tamps ll, down to exactly the desired eX- tent, and with an even and condensed surface formation. p i

For the purpose of scrapingofi' any sur- .plus material from the top or the mold, preliminary filling and tion of mounting of the finishing a modified construcplate by Figs. 9; and 10 show countersunk flat faced rivets 28 on supporting cross bars 17 and 23.

Bar 171s flexibly and resiliently mounted.

by spring cushioned studs 18. underneath the swinging arms 14 as above descrlbed.

across the middle space above the finishing plate, against bars 17 and 23 atthe same tnne,'-with .anevenly distributed action on thefinishing plate against the aggregate.

what higher than the middle, and with the hopper moved outof register, the finishing plate and tamping plate are lowered to position, as in Fig. '5. I Thereupon, plate 22 or 22 makes contact with the uneven upper portionof the aggrega-te,and the tamps 11 are again started. v In falling they strike the tamping 24 against bars 1.7 and 23, Figs. imparting a lowering and packing action to finishing plate 22. 7 Bars 17 and 23 even.- tually come into arresting contact with the upper edges of the mold, when the operation is completed.

the

9 and 10,

its advantagesin use will be appreciated by all continuously over its entire surface, or

the main such construction,the tamps 11 strikep placed on thebot 'ing the end portions of the contents some- BE (2.10M

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W beindrtierehroqtthat] llEl' cticcrzlnlisrs r. iseact'catdl imp; r. d a: tel-agape (bu warmth v ill 1; :solrt z'iclnigegr man m )l 1b a :1 irisielel'erh la; as

lplatesgwliitlzianms n in (it DMVHOTH] 10: ii i 1 Q l i s 5 pqortettejtlfitrtro. m (was r ybla sticgi :3 time lim ted: l linst wne 1t] tit agers t aim ng srccemig p lpla 1a llfllll t tan s a nmlttmgn posses :lrn e l 2a m: (B 5i? WllYnal" LI [LlZiIM 1: as 1 1 1 idieiizillyl y mounted finishing mechanism adapted to be lowered into the molding machine'for finish ing-of the contents thereof.

2. The combination with a molding machine and tamps therefor, mounted finishing mechanism consisting of a supporting frame provided with a flexibly connected finishing plate and limiting abutments providing for arrested movement of the plate within the molding machine.

3. The combination'with a molding machine and tamps therefor, mounted finishing mechanism consisting of a pivotally mounted counterweighted supporting frame, and a finishing plate flexibly and resiliently mounted on the frame for lowering insertion within the molding machine.

4. The combination with a molding machine and tamps therefor, of an adjustably mounted finishing mechanism consisting of a pivotally mounted counterweighted supporting frame, and a finishing plate flexibly and resiliently mounted on the frame for lowering insertion within the molding machine, and provided with uppersupp orting and tamping members.

5. The combination chine and tamps therefor, of an -adjustably mounted tamping mechanism consistingof a pivotally mounted counterweighted supporting frame, and a finishing plate flexibly of an adj ustably' of an adj ust-ably with a molding matamps.

signature.

and resiliently mounted on theframe for lowering insertion within the molding machine and'provided with cross bars adapted to engage the top of the and an upper tamping surface.

I 6.- In a block molding machine, the com bination with an open'top mold, of a feeding hopper, and a counterweighted frame pivoted thereto having a flexibly mounted finishing plate insertible within the mold for tamping. Y

7. In a block molding machine, the combination with an open top mold, ofa feeding hopper, and a counterweighted frame pivoted, thereto having a flexibly mounted molding machine,

finishing plate insertible within the mold and provided withupper tamping members for action thereon by vertically acting tamps. 1 Y i 8; In a block molding machine, the combination with an open top mold, of a feed-- ing hopper,

and acounterweighted frame pivoted thereto having a flexibly mounted finishing plate insertible within the mold and provided with clearance openings for the cores of the mold and upper tamping members for action thereon by vertically In testimony whereof I hereunto affix my FRANCIS J. STBAUB.

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